Best videos of 2010: Chimps that carry corpses

Unusual chimp behaviour following the death of their infants comes in at number 10 in our countdown of this year's best videos.

Footage from tropical Guinea gives an insight into how chimpanzees deal with death.
In the heat, corpses effectively become mummified, and one chimp mother carried a deceased infant for 68 days. The behaviour happens in other primates, but for shorter periods.